Merge pull request #63392 from cofyc/fixlocaltest

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix test "should fail due to non-existent path" under gce-slow

**What this PR does / why we need it**:

PR #62903 changed error string GetMountRefs() returned, which broke test `should fail due to non-existent path`.
Remove error string check to fix test.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

```
go run hack/e2e.go -- \
    --provider=local \ 
    --test \
    --test_args="--ginkgo.focus=PersistentVolumes-local.*should\sfail\sdue\sto\snon-existent\spath --clean-start=true"
```

passed now.

**Release note**:

```release-note
NONE
```

test/e2e/storage/persistent_volumes-local.go

@@ -386,7 +386,6 @@ var _ = utils.SIGDescribe("PersistentVolumes-local ", func() {
 				reason:  "FailedMount",
 				pattern: make([]string, 2)}
 			ep.pattern = append(ep.pattern, "MountVolume.SetUp failed")
-			ep.pattern = append(ep.pattern, "does not exist")
 
 			testVol := &localTestVolume{
 				node:            config.node0,